When the magazine is closed
without loading disc, does the
pickup lens tray move up and
down?
Is the EFM signal of pin 36 of
IC2
1
being output?
No
+)
l
Pickup height error
--
-
/
l
Laser diode output error
I
/
No
i
Are the voltages at pins 10 and 5
of the focus driver (IC4)
+7.3V
and
-7.3V,
respectively?
I
Is the FRF disc reflection signal
of pin 69 of the servo signal
control
(ICl)
at a high level?
I
-i
!
-
Yes
Is the high/low level repetition
output for leading the focus servo
.
y
ICl
is defective.
/
No
Yes
!
Yes
No
i
Yes
Is the output of pin 31 of
IC2
as
shown below?
_
._
Pin
69
of
ICI
FRF
Pin
31
of
IC2
FE
Yes
*
Is the high/low repetition output
’
Check to see
thit
the focus circuit is normal and check
being output from pin 8 of
IC4?
the distribution connector.
1
The pickup is defective. Replace it.
The servo amplifier (IC2) is
defective.
-
The servo amplifier (IC2) is
No
defective.
-
The focus driver (IC4) is defective. Replace it.
NO
)
Yes
i
Check connectors CNS2A/B and,
CNP2.
-
,
-25-
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